3-Spline Rear Sprocket ReplacementGoing on an extra long bikepacking expedition or just want an extra sprocket around the house? Grab a replacement rear sprocket for your Split Belt Pro Belt Drive. Rear Sprocket Only. Compatible with Split Belt Pro Belt Drive. Fits on Shimano's Alfine, Nexus, Sram Automatix, and Sturmey Archer 1 4 Speed Hubs with 3 spline pattern. Features: 30 Teeth 8mm Tooth Pitch Material: Nickel Plated Chromoly 3 Splined Mounting, 31. 85mm inner diameter 83 grams

**Only compatible with Shimano Di2 systems using MU-UR520 Belt Specific Motor Unit**

64/30T sprocket combination for a 2

equivalent to 40T Chain Sprocket

com for any questions

Why Choose our Single Speed Belt Drive

Cargo riders

we can custom cut our belts to any length

Single Speed Belt Drive

Belts also don't "stretch" like chains do

Riveting tool for Split Belt (Not included)

Have any questions about whether this is right for you and your bike

Joined by stainless steel rivets that will never rust